The Research Of Microdisk Optical Switches Based On Compound Semiconductor Materials

With the transmission of modern information's capacity increasing, all-optical communication networking has become the way of future communication networking development. The optical add-drop multiplexing (OADM) and optical cross connecting (OXC) modules are important in all-optical communication networking. Serving as kernel devices for OADM and OXC, the optical switch and optical switch array which have excellent performance and low cost is very important for the progress of optical fiber communication system. As a result, the research on optical switch and optical switch array which have excellent performance and low cost is very important for the progress of optical fiber communication system. Photonic or optical logic holds the promise of ultra-fast logic circuits .However, the jump from theory to practice has a high barrier set by critical issues such as integration, scalability and power requirements. Optical microdisk-resonator based schemes have the potential of addressing some of these issues. Because its compactness and excellent performance, microdisk resonator has become an important device unit in integrated optics. Due to its wavelength selectivity, it has attracted intensive attention to be used in filtering or wavelength selecting.This paper research relates to a novel optical microdisk switch based on GaAs compound semiconductor materials. Using the resonator's whispering gallery modes(WGMS) theory, we can realize the selective wavelength function. The optical switch owns fast speed,low loss and high couple efficiency, the extinction ratio can reach above 20dB at critical couple.The paper first describes the research development of optical communication networking and optical switch, then introduces resonator's background and application, it analyzes the whispering gallery mode theory of microdisk and the modulation principle of optical switch. The key of study is design and fabrication of microdisk on GaAs.The loss and coupling is described by models. According to microdisk's high Q theory, we put forward many structure to optimize the parameter and the performance of device. Such as MMI couple, direction coupler and negative gap couple and analyse the switch's extinction ratio and transmission characteristic.The optical switch base on spiral disk resonator has different characteristic between cw and ccw WGMS. We put forward a filter base on spiral disk to enrich our design from structure and function. Finally, we design the microdisk's fabrication process for p-i-n semiconductor material and make the mask. Also we try doing some experiments and prepare for the next study.